A masonry chimney is one of the most maintenance-intensive elements of any Chicago home. Understanding what to inspect, repair, and rebuild keeps your family safe and your home sound.
A masonry chimney performs two jobs simultaneously: it vents combustion gases safely out of the home, and it stands exposed to Chicago's most extreme weather conditions year-round. These two demands, combined with the natural thermal cycling that occurs every time a fireplace is used, make chimneys the most maintenance-intensive masonry element on any residential property. Most homeowners do not discover problems until they have become serious ones.
The most common chimney issues we encounter across Chicagoland are deteriorated mortar joints, failed crown mortar, missing or cracked flashing, and spalled brick from freeze-thaw infiltration. Each of these has a different repair approach and a different cost consequence if ignored. Deteriorated mortar, for example, progresses from a $800 tuckpointing repair to a $4,000 partial rebuild if water infiltration is allowed to continue through even one additional winter season.
Chimney crown failures are the most overlooked problem on most residential chimneys. The concrete crown at the top of the chimney stack seals the gap between the flue liner and the brick, preventing water from entering between them. When the crown cracks — which it will in Chicago's climate if the concrete mix was wrong or the application was too thin — water runs down the inside of the chimney stack, causing damage that is expensive to diagnose and more expensive to repair.
AMS provides chimney inspections, tuckpointing, crown repair, flashing replacement, and full chimney rebuilds across Chicagoland. Before any fireplace is lit for the season, we recommend a visual inspection of the crown, flashing, and mortar joints. Contact us in late summer or early fall — our schedule fills quickly as homeowners prepare for heating season, and early work avoids freeze delays.
